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8579617 Oil pump rotor  
An oil pump rotor includes an inner rotor having (n) external teeth, an outer rotor having (n+1) internal teeth, and a casing forming a suction port and a discharge port for drawing/discharging...
8573955 Scroll compressor with noise reducing discharge opening  
A scroll compressor is provided that includes a hermetic container into and out of which a refrigerant flows, a driving device installed in the hermetic container to rotate a rotation axis, an...
8573956 Multiple stage dry pump  
A dry pump includes: a plurality of cylinders; a pump chamber formed in each of the cylinders; a division wall separating pump chambers adjacent to each other; a plurality of rotors contained...
8568117 Powder metal scrolls  
Scrolls made from one or more near-net shaped powder metal processes either wholly or fabricated together from sections. Both “conventional” press and sinter methods and metal injection molding met...
8567057 Motor-compressor unit mounting arrangement for compressors  
A method of assembling a compressor, including assembling, first as a subassembly external of the compressor housing, portions of the motor-compressor unit, including a crankcase, mount brackets,...
8568118 Compressor having piston assembly  
A compressor includes orbiting and non-orbiting scrolls forming first and second fluid pockets therebetween. First and second ports are disposed in the non-orbiting scroll and radially spaced apart...
8568119 Single screw compressor  
A single-screw compressor includes a screw rotor including a spiral groove, a casing, and a gate rotor. The gate rotor includes a plurality of radial gates configured to mesh with the spiral...
8562317 Scroll expansion machine with air flow passage around outer periphery of sealing surface  
The rotating shaft is connected to the generator; the high-pressure steam s is introduced to the expansion chamber b through the guide passage; when the energy of the high-pressure steam s during...
8562319 Screw compressor having slide valve with inclined end face  
A screw compressor includes a screw rotor, a casing, a low pressure space, a bypass passage and a slide valve. The screw rotor is provided with a plurality of helical grooves forming fluid...
8562318 Multiphase pump with high compression ratio  
This disclosure relates to a new multiphase pump with low recirculated volume. This device discloses novel inlet/outlet porting. One of the disclosed improvements is to port the inlet and outlet...
8562316 Variable capacity vane pump  
In a variable capacity vane pump, a space between adjacent vanes is 1 pitch. A line that connects a half-pitch-advanced position from an end edge of an inlet port or from an end edge of an outlet...
8556598 Sealed compressor with multiple compressor unit  
A sealed compressor has an outer housing and a separator plate received within the outer housing. The separator plate defines a suction chamber and a discharge pressure chamber within the outer...
8555611 Combustion engine with feedback gear/rotary pump input  
A combustion engine, which is highly efficient, noiseless and lightweight, includes a combustion chamber without pistons. The combusted and expanded air exiting the combustion chamber flows into a...
8556609 Geared hydraulic apparatus  
An improved geared hydraulic apparatus, comprising a pair of meshing gearwheels, mounted to be reciprocally rotatable in a casing between an inlet side and an outlet side for a fluid having, in...
8556606 Water injection type screw fluid machine  
A screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft located on the high pressure side, and...
8555628 Variable displacement pump and power steering apparatus using the variable displacement pump  
A variable displacement pump including a drive shaft, a cam ring eccentrically moveable with respect to an axis of the drive shaft, and a solenoid drivingly controlled on the basis of variation in...
8556605 Scroll compressor having a rotation inhibitor  
An object is to provide a scroll compressor capable of avoiding problems caused by abnormal wear of a retaining ring used to prevent a cylindrical ring from being detached. The scroll compressor...
8556603 Progressing cavity pump adapted for pumping of compressible fluids  
A progressing cavity pump adapted for pumping of compressible fluids may include an inner rotor having a number of thread-starts together with an adapted stator or outer rotor provided with one...
8556608 Rotor drive mechanism and pump apparatus including the same  
A rotor drive mechanism 25 is configured to transfer rotation of a driving shaft 38 to an external screw type rotor 22 of a uniaxial eccentric screw pump 23 via a connecting shaft 39, the driving...
8556607 Screw rotor  
A screw rotor is for use in a screw pump that pumps fluid by rotation of a pair of screw rotors engaged with each other in a rotor housing. The screw rotor includes a multiple-thread portion for...
8556922 Motor assembly for a powered surgical instrument  
A surgical instrument is provided for cutting bone and other tissue. The surgical instrument is powered by a pressurized fluid and includes a rotatable shaft connected to a dissection tool. The...
8556604 Eccentric screw pump for mortar  
An apparatus for delivering a viscous material by means of an eccentric screw pump, includes a framework for carrying and fastening apparatus elements, a pump-housing portion for carrying a stator...
8556134 Cartridge-type single-screw pump and dye-meter equipped with such pump  
A cartridge-type single-screw pump (1) is provided. The pump (1) is adapted to volumetrically batch and deliver a certain amount of a fluid contained inside at least one storage tank and to supply...
8550792 Energy conversion device and method of reducing friction therein  
A device configured for converting energy includes a first surface, a second surface configured for moving with respect to the first surface during operation of the device, and a coating disposed...
8550057 Integral rotor noise attenuators  
A supercharger is provided, comprising a plurality of rotatable supercharger rotors each having a plurality of interleavable lobes configured to move air from an inlet to an outlet of the...
8550796 Variable capacity fluidic machine  
An internal gear fluidic machine, in particular a pump for the lubrication circuit of a motor vehicle engine, comprises an operating part including an external gear (2) and an internal gear (4),...
8550797 Scroll compressor with improved back pressure force control function  
A scroll compressor that includes: a housing, a drive unit configured to generate a rotating force; and a scroll compression unit having a fixed scroll having a spiral scroll wrap for compressing a...
8549896 Vane pump and evaporation leak check system using the same  
A vane pump has an upper casing, a lower casing, a rotor and a motor. First to fourth points are defined on an outer peripheral end of a lower flat surface of the lower casing. The first point is...
8545199 Regulatable vane-cell pump with a sealing web curving in an arc  
The invention relates to a vane pump (1), in particular a regulatable oil pump for a lubricating system, with a pump housing (2) with at least one housing tank (6) and with a vane rotor (11)...
8545200 Variable displacement oil pump  
Variable displacement oil pump includes a: rotor; vanes; cam ring; housing; biasing member biasing the cam ring in a direction enlarging an eccentricity between centers of the rotor and inner...
8544453 Supercharger cooling  
A supercharger cooling system provides a path for coolant from an air/coolant heat exchanger to a supercharger intercooler and loops around a hot outlet end of a screw type supercharger and back to...
8539769 Internal combustion engine and supercharger  
An internal combustion engine drivably connected to a variable displacement and variable internal compression ratio supercharger that supplies varying amounts of air to the engine air intake...
8539936 Supercharger rotor shaft seal pressure equalization  
A pressure equalization system reduces or eliminates a pressure differential across supercharger rotor shaft seals. Under high boost, rotor shaft seals often fail, allowing hot compressed air into...
8540500 High capacity lightweight compact vane motor or pump system  
A high capacity lightweight compact vane motor or pump system which utilizes vanes with extensions to improve efficiency of the system overall. The present invention generally includes a rotor...
8539930 Rotary combustion apparatus  
A combustion apparatus having a housing including an inner surface that defines at least one chamber, a rotor, a rotor shaft, an intake shaft, an exhaust shaft, and a gearing mechanism. The chamber...
8539931 Rotary internal combustion diesel engine  
A rotary internal combustion diesel engine (46) comprising: a posterior plate (78), an intermediate plate (80), and an anterior plate (82); a rotor-housing unit (46) on each side of the...
8535028 Downhole positive displacement motor  
A downhole positive displacement motor converts hydraulic fluid pressure into rotational torque. The motor includes a non-helical rotor and stator, and upper and lower valve assemblies each...
8535030 Gerotor hydraulic pump with fluid actuated vanes  
A gerotor pump having an outer rotor defining an inner surface of the outer rotor, a thrust plate, a pressure plate, an inlet chamber for fluid intake through the thrust plate to be pressurized,...
8535029 Scroll type compressor having reinforced fixed scroll  
A scroll type compressor has a rotary shaft, a fixed scroll member, a movable scroll member and a rib. The fixed scroll member has a fixed end plate and a fixed scroll wall. The fixed end plate has...
8529232 Compressor having capacity modulation system  
A compressor includes first and second scroll members, a structure supporting the second scroll member, and a first piston. The first scroll member includes a first end plate and a first spiral...
8528506 Rotary internal combustion engine  
A rotary internal combustion engine including: a cylinder having a cylinder circumferential wall provided with a horizontal valve groove on its inner circumferential surface; a working shaft...
8528518 Rotary piston for a rotary piston engine and rotary piston engine  
The invention relates to a rotary piston engine, in particular a rotary engine of trochoidal design, with a side disk (4) on the exhaust side and a rotary piston (6) with at least of one, and...
8529233 Displacement machine with improved support  
A displacement machine of spiral-type construction for a compressible medium includes a displacement body having a carrier disc and helical blades extending out from both sides of the carrier disc....
8529235 Oscillating variable displacement ring pump  
An oscillating variable displacement ring pump provides both positive and variable displacement. A housing circumscribes a pump chamber. The pump chamber encases an oscillating ring driven by a...
8528505 Rotary internal combustion engine  
A rotary internal combustion engine including: a cylinder having a cylinder circumferential wall provided with a horizontal valve groove on its inner circumferential surface; a working shaft...
8529231 Apparatus for cleaning rotation body and vacuum pump having the same  
An apparatus includes a rotation body having one or more rotary shafts having projections, and a cleaning part disposed adjacent to the projections, having one or more rotation holes into which the...
8529234 Water injection type screw fluid machine  
A water-lubrication type screw fluid machine has a first non-contact seal, a second non-contact seal and a lip seal disposed between a rotor chamber and a bearing for a rotor shaft. The bearing is...
8523548 Screw compressor having a gate rotor assembly with pressure introduction channels  
A single-screw compressor includes a casing, a screw rotor accommodated in the casing, a gate rotor, and a gate rotor supporting member rotatably supporting the gate rotor. The gate rotor includes...
8523534 High-pressure pump for supplying fuel to an internal-combustion engine  
A high-pressure pump for supplying fuel to an internal-combustion engine has a pump body and an actuating shaft which extends along a longitudinal axis and which is supported rotatably about the...
8523545 Stator to housing lock in a progressing cavity pump  
A reinforcing interface between the stator and its housing in a progressing cavity pump is created from ribs extending inwardly into the stator from the housing inner wall that can be...